The future of sex is often bizarre, always exciting, and occasionally very philosophical. New tech, like virtual reality, makes it possible to live out fantasies that in the past could only have played on TV or in our heads. And bringing our fantasies to life can raise some interesting–and often nerve-wracking–questions.

Recently, Broadlyspoke to people with macrophilia–a fetish for giants–about their plans to use virtual reality to make their fantasies come true. Eighty-foot-tall women are unlikely to exist any time soon, but using the new tech, computer-generated giants can be created in a virtual world–allowing people with this fetish an unprecedented opportunity to gaze adoringly upwards at incomprehensibly massive bottoms. But it's not just those with unusual fetishes–VR could put a whole bunch of fantasies into the hands of we mere mortals.

Right now, all you need to watch VR porn is a smartphone, a headset, and a spare five minutes. You pop your phone into the headset (budget headsets will set you back $20-25–they're basically just plastic helmets you strap to your face), then watch one of the many virtual reality porn videos available online. Most are simple POV scenes: shot with one performer "wearing" the camera on their head and being fellated/shagged/treated to a sexy dance by another hot performer. Those are the basics, and that's what you can mainly expect from porn production studios at the moment. But let's examine some of the future fantasies that could be fulfilled given a bit more time and imagination.

The obvious first choice is celebrity sex. There are already lots of porn films made with people who bear a close resemblance to celebrities, but by combining virtual reality with improved computer graphics, in the future it will be more than possible to fulfill your dreams with a computer-animated copy of your favorite star. Personally, I've got my fingers crossed for either Mike Colter (who plays Luke Cage) or Daniel Radcliffe.

Alongside new possibilities, there are serious ethical implications. What if Daniel Radcliffe doesn't want random horny women strapping on a virtual reality headset and having sex with his CGI twin? Consent is vital in any sexual interaction, and I'm sure most of us would feel pretty awful if we had a tumble with our favorite star via virtual reality, only to find out later that they hadn't given permission to the game company to rip off their likeness. This is, in fact, already an issue for some celebrities. Sex toy company Pipedream caused a huge stink in 2014 when they used the celebrity nude hacking scandal as inspiration for a "J-Law Hacked" sex doll. You read that right: They made a sex doll and marketed it under Jennifer Lawrence's name to cash in on the gross invasion of her privacy. What absolute charmers.

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Luckily, as with most ethical dilemmas, there's an option for those who want to indulge their fantasies without falling into "terrifying creep" territory: Pick someone who's agreed to do it. There are a number of porn stars who are keen to tap into the enthusiasm for virtual reality, by offering scenes that literally put you at the center of the action. So while Daniel Radcliffe might not be licensing his face for my porn lust any time soon, there are plenty of adult performers I have crushes on who may be willing to fulfill my dreams.

Let's look at some other fantasy-fulfillment possibilities. The most fun–to my mind–are those which are simply not possible in real life. You don't need to look as far as tentacle porn to find examples of impossibility: how about one of the most common fantasies of all–twins? In real life, the chances of a pair of twins actually wanting to have sex with me (and each other) are slim to none. But virtual reality modeled on real-world porn stars could be used to trick your brain into believing you really were having sex with the same person twice. Or three times. Come to think of it, if we can clone virtual lovers, what's to stop me having an orgy with 10 identical hot people at the same time? The only ethical dilemma here, I think, is whether or not such a realistic manifestation of a fantasy would make my real-life partner uncomfortable: There have already been mutterings from some who think that virtual reality porn is so intense that when their partner watches it, it feels more like cheating than a simple session in front of a laptop.

Perhaps even more ethically fraught, then, is the issue of home-made virtual reality. At the moment, the technology is too expensive to allow all of us to make our own dirty home videos. But as the tech comes down in price, it'll only take a few years to make this dream a reality. We can do what we do with our iPhones, only this time in VR video. While it might not seem uncomfortable for you to occasionally look at those photos your ex-girlfriend sent you while you were away on holiday, how OK would it be for you to strap on a headset and literally relive one of your sex sessions? My partner is pretty open-minded, not to mention a huge fan of virtual reality porn, but I don't think he'd be delighted to walk in on me having a nostalgic wank over a VR scene I shot with my ex.

Whatever your fantasy, virtual reality can help you fulfill it. But there's a reason why near-future science fiction often ends up getting a bit Black Mirror: Wherever technology offers us a new way to play, it also throws up brand new ethical questions about how we should use it and when. So whether you're shagging an imaginary giant, reliving sex with your ex, or hoping that your favorite celebrity will give their permission to be cloned in a virtual universe, sex tech helps us get to better grips with not just with our fantasies, but the ethics of bringing them to life.

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